Minnesota Vikings: Erin Henderson will sit out another game

Vikings linebacker Erin Henderson takes a breather during workouts at an organized team activities session at Winter Park in Eden Prairie on Wednesday May 30, 2012. (Pioneer Press: Richard Marshall)

Vikings linebacker Erin Henderson will miss his second straight game with a concussion, coach Leslie Frazier said on Friday, Sept. 28.

Henderson did not practice for a third consecutive day on Friday, and still has not passed a league-mandated concussion test. He also sat out the Vikings' 24-13 win over the San Francisco 49ers, after sustaining the concussion during the team's Sept. 16 loss to the Indianapolis Colts.

In Henderson's place, Marvin Mitchell will start at middle linebacker, with Jasper Brinkley replacing him in the Vikings' nickel package.

Quarterback Christian Ponder was back on the field after a sore neck made him a limited participant in practice on Thursday. So was tight end Kyle Rudolph, who was limited on Thursday because of a quadriceps injury. Safeties Andrew Sendejo and Mistral Raymond, who are both nursing ankle injuries, did not practice.